EP1651005A2 - Synchronisierung von erzeugtem Ton bei binauralem Hörsystem - Google Patents

Synchronisierung von erzeugtem Ton bei binauralem Hörsystem Download PDF

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Publication number
EP1651005A2
EP1651005A2 EP05027729A EP05027729A EP1651005A2 EP 1651005 A2 EP1651005 A2 EP 1651005A2 EP 05027729 A EP05027729 A EP 05027729A EP 05027729 A EP05027729 A EP 05027729A EP 1651005 A2 EP1651005 A2 EP 1651005A2
Authority
EP
European Patent Office
Prior art keywords
hearing
hearing device
audio signals
signals
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05027729A
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English (en)
French (fr)
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EP1651005A3 (de
EP1651005B1 (de
Inventor
Hans-Ueli Roeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sonova Holding AG
Original Assignee
Phonak AG
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Filing date
Publication date
Application filed by Phonak AG filed Critical Phonak AG
Priority to DK05027729.2T priority Critical patent/DK1651005T3/en
Priority to EP05027729.2A priority patent/EP1651005B1/de
Publication of EP1651005A2 publication Critical patent/EP1651005A2/de
Publication of EP1651005A3 publication Critical patent/EP1651005A3/de
Application granted granted Critical
Publication of EP1651005B1 publication Critical patent/EP1651005B1/de
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/552—Binaural
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication

Definitions

  • the invention relates to a binaural hearing system comprising two hearing devices, one for each ear of a user of the hearing system, and to a method of operating such a hearing system and a method of synchronization in such a hearing system.
  • a hearing system is a linked pair of hearing devices.
  • the hearing devices can be hearing aids, worn in or near the ear or implanted, headphones, earphones, hearing protection devices, communication devices or the like.
  • a monaural hearing device which comprises a signal emission device by means of which a user of the hearing device can be informed that a particular setting of the hearing device has been selected.
  • a monaural hearing device is known, which allows to play user-defined sequences for acknowledging an action that has been carried out on the hearing device.
  • a binaural hearing system is known, in which audio signals obtained from digitizing output signals of a microphone of the hearing system are transmitted from one hearing device of the system to the other hearing device of the system via a communication link. Furthermore, control signals can be transmitted via said communication link.
  • Such control signals can, e.g., be signals for controlling a signal processor of a hearing device, or signals by means of which a first of the two hearing devices acknowledges to the second hearing device that is has received a control signal that was transmitted from the second hearing device to the first hearing device.
  • the two hearing device are synchronized by a controlled time-multiplexer unit, which is operated by a respective time control unit, wherein the two time control units are synchronized via said communication link.
  • A1 binaural hearing systems are known, which provide for "virtual sound sources" in the sense that system-generated sounds can be perceived by a user of the system as if they were generated in different locations near the user.
  • Said DE 10 2004 035 046 A1 does not disclose, how to achieve the time synchronization (and timing accuracy) between the signals to be perceived by the user with his left and his right ear, respectively, which is necessary in order to predictably achieve such a virtual sound source effect.
  • a goal of the invention is, to create a binaural hearing system and a method of operating a hearing system and a method of synchronization in a hearing system with enhanced possibilities for giving the user of the hearing system the impression that he perceives signals from a certain location or certain direction.
  • One object of the invention is to provide for a binaural hearing system and a method of operating a hearing system and a method of synchronization in a hearing system with improved possibilities for synchronizing the perception of sound in the user's left and the right ear.
  • Another object of the invention is to provide for a binaural hearing system and a method of operating a hearing system and a method of synchronization in a hearing system providing for a precisely predictable time difference between the user's perception of system-generated signals in the user's left and right ears.
  • An audio signal (or sound message) originating from a single source is presented to the user with a deterministic delay between the two sides.
  • the invention can be used in conjunction with acknowledge signals (or other sound messages) as the signals to be perceived by the hearing device user.
  • Acknowledge sounds also called feedback sounds, are played to the user upon a change in the hearing device's function, e.g., when the user changes the loudness (volume) or another setting or program of one or both hearing devices, or when some other user's manipulation shall be acknowledged, or when the hearing device by itself takes an action, e.g., by making a change, e.g., if, in the case of a hearing aid, the hearing aid chooses, in dependence of the acoustical environment, a different hearing progam (frequency-volume settings and the like), or when the hearing device user shall be informed that a hearing device's battery is low.
  • Said signals to be perceived by the user are often acoustic signals (sound waves), but may be other signals as well, e.g., in the case of implanted hearing devices.
  • the hearing devices' output transducers can therefore be electro-to-mechanical converters (loudspeakers) or others, e.g., electrical-to-electrical converters.
  • Said audio signals are usually electrical signals, analogue and/or digital.
  • Said communication link may be wireless (typically electromagnetically; e.g., in the radio frequency range via frequency modulation, or Ultra-Wide-Band communication UWB), or wire-bound.
  • Said communication link allows for communication at least from said first hearing device to said second hearing device, but usually allows for bidirectional communication.
  • Said communication link may involve at least one transmitter comprised in said first hearing device and at least one receiver comprised in said second hearing device. It may, in addition, comprise at least one receiver comprised in said first hearing device and at least one transmitter comprised in said second hearing device.
  • Said sound generator may be implemented in software or (partially) in form of hardware.
  • said first and said second hearing devices each comprise an input transducer for receiving incoming signals and for converting said incoming signals into audio signals.
  • incoming signals are incoming sound
  • said input transducers are mechanical-to-electrical converters (microphones), but converters receiving electromagnetical waves and converting these into audio signals are also possible (e.g., in case of a telephone coil or reception of a remote microphone signal via a frequency modulation -FM- receiver).
  • at least one of said hearing devices usually both (said first and said second hearing devices), each comprise a signal processor for processing audio signals.
  • the system comprises, comprised in said first hearing device, a first sound memory, which comprises a first set of data, which describe audio signals (in particular, first audio signals), and, comprised in said second hearing device, a second sound memory, which comprises a second set of data, which describe audio signals, wherein said first and second sets of data are substantially different from each other.
  • both hearing devices contain data describing (different) audio signals, and, accordingly, the required storage space in each hearing device can be (up to) halved (with respect to storing the same data in each hearing device).
  • the sound generator can produce the corresponding audio signal, which finally can be transmitted to the second hearing device and transduced into signals acknowledging said manipulation (on both sides).
  • the data sets can be considered first and second sets of acknowledge sound descriptions (or representations).
  • audio signals may be described, e.g., in a parametrized form (e.g., as a frequency to be played and a time for which it is to be played), or in a sampled form (e.g., compressed, like in MP3 format).
  • a parametrized form e.g., as a frequency to be played and a time for which it is to be played
  • sampled form e.g., compressed, like in MP3 format
  • At least one of said first and said second hearing devices comprises a storage unit containing information on the contents of said first sound memory and/or of said second sound memory.
  • a storage unit containing information on the contents of said first sound memory and/or of said second sound memory.
  • the storage unit may be a table or a look-up table. Accordingly, said storage unit may be considered to contain information on whether audio signals to be sent to said output transducers can be obtained from data contained in said first sound memory (i.e., in said first set of data) or from data contained in said second sound memory (i.e., in said second set of data).
  • the system furthermore comprises a second sound generator for generating second audio signals, which is comprised in said second hearing device, and wherein said second hearing device is adapted to transmitting said second audio signals to said first hearing device via said communication link.
  • both hearing devices comprise a sound generator, and sound generated in either sound generator may be transmitted to the other hearing device.
  • Said first audio signals, and also said second audio signals may comprise or be acknowledge sound signals.
  • the corresponding time delays in each hearing device can be calculated in advance, and corresponding delays may be used in order to let the user perceive the sounds in each ear with a well-defined time delay.
  • the method for operating a hearing system comprising a first and a second hearing device and a communication link connecting the two hearing devices comprises the steps of
  • the features of the method of synchronization in a hearing system corresponds to the features of the method for operating a hearing system.
  • the method allows for a synchronized perception of signals to be perceived by the user in each ear.
  • the method may furthermore comprise the steps of
  • said first hearing device comprises a first sound memory, which comprises a first set of data, which describe audio signals (first and/or second audio signals)
  • said second hearing device comprises a second sound memory, which comprises a second set of data, which describe audio signals (first and/or second audio signals)
  • said first and second sets of data are substantially different from each other, further comprises the step of
  • This method wherein at least one of said first and said second hearing devices comprises a storage unit containing information on the contents of said first sound memory and (or and/or) of said second sound memory, may further comprise the steps of
  • a command can be transmitted (via said communication link) to the other hearing device (which comprises the sound memory comprising said data) in order to retrieve the desired sound memory data.
  • FIGs. 1 and 2 show schematic diagrams of hearing systems 1.
  • a hearing system 1 comprises two hearing devices 10L and 10R, which may be similarly or identically structured.
  • the hearing device 10L of Figs. 1 and 2 may comprise some more elements, in particular such, which are only drawn in the first hearing device 10R.
  • audio signals (audio data streams) are drawn as solid arrows; control signals or data are represented by dashed arrows. Not all possible signal flows are indicated, but only some, which are required to explain the invention.
  • the hearing devices 10R,10L comprise controllers or control softwares 15L,15R.
  • the hearing devices 10L,10R comprise input transducers 11L,11R, typically microphones, which convert incoming sound 5 into audio signals (analogue and/or digital electrical signals). These audio signals may be processed in signal processors 13L,13R, preferably digital signal processors (DSP), and are possibly amplified in amplifiers 14L,14R before being converted into signals 7,8 to be perceived by a user of the hearing system 1 by output transducers 12L,12R, typically loudspeakers.
  • DSP digital signal processors
  • a user interface 16R, a sound generator 17R and a transmitter Tr of hearing device 10R are drawn.
  • Hearing device 10L comprises a receiver Re.
  • the DSP 13R and the amplifier 14R may be integrated within the same software or electrical unit.
  • the controller or control software 15R may be integrally formed with DSP 13R and/or amplifier 14R.
  • the hearing device controlling software 15L,15R may be implemented in a separate processor, but does not have to. The same applies for the corresponding elements of the hearing device 10L.
  • Fig. 1 it is sketched, how a concurrent or (practically) jitter-free perception by the user of an acknowledge sound, e.g. upon a volume change in hearing device 10R, can be achieved.
  • the user manipulates the user interface 16R in order to change the volume (loudness) of signals 7,8 he perceives (typically the loudness in both hearing devices shall be changed).
  • This generates a control signal, whereupon the sound generator 17R is instructed by the controller 15R to generate an appropriate sound message (acknowledge signal), which is referred to as first audio signals 30.
  • the first audio signals 30 are, on the one hand, fed to the output transducer 12R (e.g., via DSP 13R and amplifier 14R, or directly, or in between the two) to be converted into signals 7 to be perceived by the user, and on the other hand, fed to the transmitter Tr of the hearing device 10R.
  • the output transducer 12R e.g., via DSP 13R and amplifier 14R, or directly, or in between the two
  • the transmitter Tr of the hearing device 10R instead of adding the first audio signals 30 to audio signals obtained from incoming sound 5, they may as well replace those audio signals.
  • the first audio signals 30 are made available in the hearing device 10L, where they are, in analogy to the hearing device 10R, converted into signals 8 to be perceived by the user. It is possible to foresee a delay unit in the signal path (at least in the hearing device 10R), which allows for compensating and/or introducing time delays between the two hearing devices 10L,10R. For example, if processing (and amplifying) steps are the same for the first audio signals 30 in both hearing devices 10L,10R, the only step causing a time delay between the two hearing devices is the transmission of the first audio signals 30 via the communication link 20.
  • a pre-determinable delay of the order of, e.g., some milliseconds is introduced, which may have a jitter of the order of some microseconds to 10 ⁇ s or 30 ⁇ s. This delay can by compensated by such a delay unit. And additional delays between both sides (typically of the order of some 10 ⁇ s to some 100 ⁇ s) can be willingly introduced in order to simulate that the perceived signal 7,8 originates from a certain (predetermined) direction.
  • the (first) audio signals may be processed using Head-Related Transfer Functions (HRTF) in the sense that not only interaural time differences (ITD) are applied as described above, but also interaural level differences (ILD), or, more generally speaking, frequency dependent interaural amplitude and phase differences.
  • HRTF Head-Related Transfer Functions
  • ITD interaural time differences
  • ILD interaural level differences
  • Fig. 2 shows, in the manner of Fig. 1, a schematic diagram of another hearing system 1. The embodiment is similar to the one of Fig. 1, and mainly the additional or different features will be described.
  • Both hearing devices 10L,10R comprise a sound memory 18L,18R, in each of which a set of data describing audio signals (e.g., acknowledge sounds and/or speech sounds) are contained.
  • the sound memory 18R may contain (data describing) acknowledge sounds, which are to be played when the volume is increased, when the volume is decreased, or when the battery level is low, whereas in the sound memory 18L, (data describing) acknowledge sounds may be stored, which acknowledge a change from one hearing program to another hearing program.
  • both hearing devices 10L, 10R contain storage units 19L,19R, by means of which the respective controller 15L,15R can find out, whether a desired audio signal is stored in the sound memory 18L of the hearing device 10L or in the sound memory 18R of hearing device 10R.
  • Both hearing devices comprise a transmitter Tr and a receiver Re each, thus enabling a bidirectional communication link 20.
  • the controller 15R ensures that the requested data 40 representing (describing) the requested first audio signals 30 are loaded from the sound memory 18R and that the requested audio signals 30 are generated.
  • the requested audio signals 30 are fed towards the output transducer 12R and, in addition, transmitted to the second hearing device 10L via the communication link 20, from where it is transmitted to the output transducer 12L
  • the second hearing device 10L may comprise a sound generator.
  • data and/or audio signals have to be transmitted via the communication link 20.
  • Fig. 3 shows a block diagram of a simple method of operating a hearing system 1.
  • the steps 100 - 300 are self-explaining.
  • the invention enables for a deterministic (predictable) latency and negligible jitter for signals to be perceived by the user's two ears.
  • the invention is particularly useful, when speech signals or more complex sounds are to be generated and presented to the user.
  • the complexity of a sound may manifest in its (large) spectral content, its structure in time or rhythmic or percussive structure.
  • Speech sounds may be used for guiding the user, informing the user and acknowledging events in the hearing system. Requirements for latency and jitter are less tough for simple sounds, like sine tones that fade in and fade out.
  • An appended “R” in a reference symbol indicates that the respective element is part of the first hearing device 10R; an appended “L” in a reference symbol indicates that the respective element is part of the second hearing device 10L.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Stereophonic System (AREA)
EP05027729.2A 2005-12-19 2005-12-19 Synchronisierung von erzeugtem Ton bei binauralem Hörsystem Active EP1651005B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK05027729.2T DK1651005T3 (en) 2005-12-19 2005-12-19 Synchronization of sound generated in binaural hearing aid system
EP05027729.2A EP1651005B1 (de) 2005-12-19 2005-12-19 Synchronisierung von erzeugtem Ton bei binauralem Hörsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05027729.2A EP1651005B1 (de) 2005-12-19 2005-12-19 Synchronisierung von erzeugtem Ton bei binauralem Hörsystem

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EP1651005A2 true EP1651005A2 (de) 2006-04-26
EP1651005A3 EP1651005A3 (de) 2006-07-05
EP1651005B1 EP1651005B1 (de) 2017-03-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006772A2 (en) * 2006-07-12 2008-01-17 Phonak Ag Method for operating a binaural hearing system as well as a binaural hearing system
EP1885156A2 (de) 2006-08-04 2008-02-06 Siemens Audiologische Technik GmbH Hörhilfe mit einem Audiosignalerzeuger
WO2009080108A1 (en) * 2007-12-20 2009-07-02 Phonak Ag Hearing system with joint task scheduling
EP2547122A1 (de) * 2010-03-08 2013-01-16 Panasonic Corporation Hörgerät
US8526648B2 (en) 2007-01-22 2013-09-03 Phonak Ag System and method for providing hearing assistance to a user
EP1976332A3 (de) * 2007-03-29 2015-02-25 Siemens Audiologische Technik GmbH Verfahren und Einrichtung zur Widergabe synthetisch erzeugter Signale durch ein binaurales Hörsystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0941014A2 (de) 1998-03-03 1999-09-08 Siemens Audiologische Technik GmbH Hörgerätesystem mit zwei Hörhilfegeräten sowie Verfahren zum Betrieb eines solchen Hörgerätesystems
US20020131613A1 (en) 2001-03-13 2002-09-19 Andreas Jakob Method for establishing a binaural communication link and binaural hearing devices
DE102004035046A1 (de) 2004-07-20 2005-07-21 Siemens Audiologische Technik Gmbh Hörhilfe-oder Kommunikationssystem mit virtuellen Signalquellen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057367B1 (de) * 1998-02-18 2008-01-09 Widex A/S Binaurales digitales hörhilfesystem
DE102004035256B3 (de) * 2004-07-21 2005-09-22 Siemens Audiologische Technik Gmbh Hörhilfegerätesystem sowie Verfahren zum Betrieb eines Hörhilfegerätesystems bei Audio-Empfang

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0941014A2 (de) 1998-03-03 1999-09-08 Siemens Audiologische Technik GmbH Hörgerätesystem mit zwei Hörhilfegeräten sowie Verfahren zum Betrieb eines solchen Hörgerätesystems
US20020131613A1 (en) 2001-03-13 2002-09-19 Andreas Jakob Method for establishing a binaural communication link and binaural hearing devices
DE102004035046A1 (de) 2004-07-20 2005-07-21 Siemens Audiologische Technik Gmbh Hörhilfe-oder Kommunikationssystem mit virtuellen Signalquellen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008006772A3 (en) * 2006-07-12 2008-02-28 Phonak Ag Method for operating a binaural hearing system as well as a binaural hearing system
EP2039218B1 (de) 2006-07-12 2020-12-02 Sonova AG Verfahren zur bedienung eines binauralen hörsystems sowie binaurales hörsystem
US8295497B2 (en) 2006-07-12 2012-10-23 Phonak Ag Method for operating a binaural hearing system as well as a binaural hearing system
WO2008006772A2 (en) * 2006-07-12 2008-01-17 Phonak Ag Method for operating a binaural hearing system as well as a binaural hearing system
EP1885156A2 (de) 2006-08-04 2008-02-06 Siemens Audiologische Technik GmbH Hörhilfe mit einem Audiosignalerzeuger
EP1885156A3 (de) * 2006-08-04 2011-11-09 Siemens Audiologische Technik GmbH Hörhilfe mit einem Audiosignalerzeuger
US8411886B2 (en) 2006-08-04 2013-04-02 Siemens Audiologische Technik Gmbh Hearing aid with an audio signal generator
US8526648B2 (en) 2007-01-22 2013-09-03 Phonak Ag System and method for providing hearing assistance to a user
US10104480B2 (en) 2007-03-29 2018-10-16 Sivantos Gmbh Method and facility for reproducing synthetically generated signals by means of a binaural hearing system
EP1976332A3 (de) * 2007-03-29 2015-02-25 Siemens Audiologische Technik GmbH Verfahren und Einrichtung zur Widergabe synthetisch erzeugter Signale durch ein binaurales Hörsystem
US8477975B2 (en) 2007-12-20 2013-07-02 Phonak Ag Hearing system with joint task scheduling
WO2009080108A1 (en) * 2007-12-20 2009-07-02 Phonak Ag Hearing system with joint task scheduling
EP2547122A4 (de) * 2010-03-08 2013-01-16 Panasonic Corp Hörgerät
EP2547122A1 (de) * 2010-03-08 2013-01-16 Panasonic Corporation Hörgerät

Also Published As

Publication number Publication date
EP1651005A3 (de) 2006-07-05
EP1651005B1 (de) 2017-03-22
DK1651005T3 (en) 2017-07-10

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